Chables la dow



(No Model.) 7

0. LA DOW.

'PULVERIZEB, No. 375,864. PatentedDec 27, 1887.

UNITED STATES PATENT OFFICE.

CHARLES LA DOW, OF- ALBANY, NEW YORK.

PULVERIZER.

SPECIFICATION forming part of Letters Patent No. 375,354, dated December 27, 1887.

(No model.)

To, all whom, it may concern..-

Be it known that I, CHARLES LA Dow, of the city of Albany, county of Albany, State of New York, have invented a new and useful Improvement in Pulverizers, of which the following is a specification.

My invention relates to that class of pulverizers which employs spiral or screw cutters arranged in two gangs and capable of being set at angles to each other, so as to pulverize the soil.

In the drawings, Figure 1 represents a top view of myinvention, showing by dotted lines that the gangs may be angled either in front or in rear of a right angle relatively to the draft-pole, so as to throw the earth either toward or from the center of the machine. Fig. 2 is an end view showing by dotted lines the vibration of the outer ends of the gangs. Fig. 3 is a top sectional view showing the inner ends of the gangs set at angles to each other, and also arranged to throw the earth toward each other.v

In the drawings, A is the pole; B and B, the gang coils or spirals; O and O, the linkconnections between the lever and the gangcoils; G, the crossbar on which the gangs vibrate; f, the pin for coupling the lever link O limiting the vertical vibration of the inner ends of the gangs; 1), the boxing which supports the cross-bar relatively to thecoils; d and d, the rivets which hold said boxing in place on thecoil; e, the box which supports the cross-bar relatively to the pole by means of the bolts i i; L, the lever, and S the seat. Each gang is composed of aband of thin metal coiled in a spiral or screw of any diameter desired and having any desired space between the coils, which are sharpened at their outer edges. Each end of each gang is left open, so that any rubbish that may pass between the coils will be carried endwise through their cylinders and out of the ends of the same by the screw action of the coils. The gangs can be set to throw the earth either toward or from each other by means of the adjusting devices shown or in other ways. Such is a very important advantage in a pulverizer having screw-coils, for the reason that any sticky earth adhering to the blades can be. instantly removed by reversing their working-faces, which is accomplished by varying their angle from one position shown in dotted lines to the opposite position shown in dotted lines in Fig. 1. Any rubbish that may work through the spaces between the coils will be riddled and worked endwise out from the cylinder formed by the surrounding coils, and thus clods and chunks of earth that escape the cuttingedge of the coils will be pulverized by the endwise screw action just described. These coils will not be as liable to-clog as if their outer ends were coupled together by cross-bars or were partially or whollyinclosed by heads or drums.

The gangs are capable of vibrating in all directions in their journal-boxings on the crossbars, and said journal-boxings also permit the level by gripping the pinp and its nut 22 firmly to the sides of the slotted links 0 and 0, so as to prevent their vertical movement, and thus hold the outer and inner ends of the gangs from vibrating in a vertical direction, but permitting them to vibrate horizontally, so as to adjust their angles in any direction desired. Each gang may be formed with double coils, mounted upon each other, by means of two boxings, b, for each gang in such manner as will leave the ends of the cylinders of each gang open so as to. insert a crossbar; or two or more coils in each gang may be mounted upon each other in other ways; but I prefer the construction-shown.

Each coil of cutters has resilience between its ends both lengthwise and crosswise, so that when the gangs are angled they can yield laterally from an obstruction against their sides, and when rolling over a stone any of the coils can yield in cross-section, so that the stone will not lift any portion of the gang from the ground except the portion having contact with the stone. In applications No. 223,616, filed January 6, 1887, and No. 240,672, filed June 8, 1887, I have shown machines somewhat ICO similar to that herein illustrated, and I therefore disclaim herein any subject matter claimed in said applications.

Having described my invention, I claim- 1. In a pnlvcrizer, a pole, two cylindrical gangs of cutters, and a cross-bar or other equivalent device entering the cylinder of each gang and attached thereto, in combination with mechanism for varying the angle of the gangs.

2. In a pulverizer, a poleand cross-bar or other draft-frame, and two gangs of spiral coils attached thereto adapted to support the draftframe from boxings located within the cylinders of the gangs, in combination with mechanism for varying the angle of the gangs.

3. In a pulverizer, the combination of a frame or pole, a crossbar or other draftframe, two gangs of spiral coils, one on each side of the central draft-line, into which the cross-bar projects part way, and devices for connecting the crossbar and coils.

at. In a pulvcrizer, a draft-frame, in combination with two gangs of spiral coils adapted to have their outer ends adjusted to angles both in front and rear of a right angle relatively to the draft-frame.

5. In a pulverizer, a draft-frame and two gangs of spiral coils mounted on the draft-frame and adapted to turn the earth either to or from each other.

6. In a pulverizer, a draft-frame, in combination with gangs of spiral cutting-coils attached thereto and having their inner ends open.

7. In a pulverizer, a pole, cross-bar, and a gang of spiral coils, in combination with the boxing 1), arranged within the cylinder and intermediate between the outer and inner ends of said gangs.

8. In a pulverizer, the combination of apole or frame, a cross-bar, and a gang of cutters formed of a continuous spiral band which encircles the cross-bar.

9. In a pulvcrizer, the combination ofa pole or frame, a cross-bar, and a gang of spiral eutters on each side of the pole, which encircles the cross-bar and has its inner end immediately adjacent to the pole.

10. In a pulverizer, a pole and a cross-bar having a universal joint directly on one end of said cross-bar, in combination with mechanism located within the cylinder of a gang of cutters adapted to permit the vibration of said gang.

11. In a pulverizer, the combination of the pole A, gangs of cutters B and B, cross-bar G, and braces O and 0, attached to the extreme ends of the gang.

12. In a pulverizer, the combination of the pole A, gangs of cutters B and ll, cross-bar G, and braces O and 0, attached to the extreme ends of the gangs, and lever L.

13. In a pulverizcr, a draft-frame, in combi nation with a gang of spiral cutters composed of a single coil of metal attached to the draft frame intermediate of the length between the ends of said coil, and an adjusting-link attached to an end of said coil.

14. In a pulverizcr, the combination of the pole A, gangs of cutters B and 3, crossbar G, and braces O and O, lever L, and links 11.

15. In a pulvcrizer, a pole, a cross-bar, and a gang of cutters, which vibrates as a gang and is adapted to encircle said cross-bar and to revolve around the same.

16. In a pulverizer, a pole, a cross-bar, and a gang of cutters adapted to encircle said crossbar and to revolve around the same, in combination with a hinge located between the crossbar and gang, which permits the gang to be adjusted relatively to the cross bar.

17. The combination of a pole or frame, a gang of cutters on each side of the pole, braces or links extending from the gangs to the pole, the pivotal connection between the links and the pole at their forward ends, and the pivoted link-connection between the pole and braces in rear of said pivotal connection.

18. The combination of a frame and draft devices, and opposing spiral cutters adapted to be set to turn the earth toward the center of the machine, said cutters being constructed to permit the earth to pass outwardly endwise through them,whereby the formation of a ridge between the inner ends of the gangs is avoided.

19. The combination of a draft'frame, aspiral cutter, and a connection between the cutter and frame at a point between the ends of the cutter.

20. The combination of a' frame, opposing gangs of spiral cutters, and a connection between each cutter and the frame located at a point between the ends of the cutter, whereby the weight of the frame is applied to the spiral cutters intermediate of their length.

CHARLES LA DOW. 

